Thank you for your responses! I was away for the weekend and am just catching up.
I spoke with her teacher later that day and she felt that DD was very ready to start staying for the full day. So DD and I decided that Monday and Tuesday would be her long days and that Wed-Fri would be her half-days. I told her that her half-days would be her "surprise snack" days. I think that hunger just makes the whole transition worse. I'm going to surprise her with a little healthy snack when I come to pick her up.
Mamaguess: thank for the reminder about creating transitions. Her teachers and I are working together on this. And we are going to start with a couple of long days this week. She's usually pretty good with transitions....just hadn't encountered the full appeal and fascination of SCHOOL.
Seedling: Chopped liver! Yes, that's it! I have so much Mama guilt about sending her to school so young....but she is just so ready to run! During my more assured moments, I can remember that this independence and self-confidence is probably a sign of how attached she feels. She just loves every single aspect of school so far (said with the knowledge that we're still very much in the honeymoon stage....).